High quality precision screws Mechanical and physical properties : Gr.2 Gr.5 Gr ... blue yellow),black oxide , dacromet • Plating:BlackOxide,Zinc,Chrome,Galvanized,Nickle,Dacromet, Delta-Tone, Geomet,Ruspert• Packing: AS you ... ’s requirementStandard:ISO, DIN, ANSI, JIS, BS, Non-standardSurface :Galvanized (Various of color), dacromet, blackened, phosphatingCertificationISO/TS16949,ISO9001,GJB9001B - ...